Someone reading my plans suggested that:
Whilst the reflectance pool would undoubtedly contribute to daylighting and would help in the winter months to reduce use of artificial lighting, it is suggested that the water may absorb most of the incoming shortwave energy and release longwave radiation (heat) back to the sky.
Is above statement true?
A StackExchange on whether reflection preserve wavelength suggests that a perfect mirror will preserve wavelength. Reflecting both heat and light. I understand that the surface of the water is not a perfect mirror and that only a proportion of the light/heat would be reflected.
This meteorologist seems to confirm that a low sun will reflect heat:
When the sun is low on the horizon (low sun angle) more radiation will be reflected off water.. A low sun angle has a more difficult time warming water because a great percentage of the solar radiation is reflected away.
Would the reflecting pool illustrated contribute heat to the house in the winter? Would the sunlight reflected by it contain longwave radiation (heat)?